(1/3r)+(1/4r)=7 - solution

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Solution for (1/3r)+(1/4r)=7 equation:

r in (-oo:+oo)

(1/3)*r+(1/4)*r = 7 // - 7

(1/3)*r+(1/4)*r-7 = 0

7/12*r-7 = 0 // + 7

7/12*r = 7 // : 7/12

r = 7/7/12

r = 12

r = 12

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